Materials Literature
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By creating nanostructures and controlling the hydrogen content and sp3/sp2 bonding ratio, we report the formation of very hard (35.8 GPa) hydrogenated diamond-like carbon film at a self-bias of −100 V using simple radio frequency-plasma enhanced chemical vapor deposition process. When the self-bias is varied and modi…
Abstract Organosoluble polyimide (PI)/ceramic composite films with different BN or (BN + AlN) contents were under investigation for their thermal conductive performances. The chosen polyimide constituted by 4,4′‐oxydiphthalic dianhydride/2,2‐bis(3‐amino‐4‐hydroxyphenyl)hexafluor opropane could be dissolved and cast in…
Abstract We describe the preparation, characterization and physical properties of multiwalled carbon nanotube ( MWCNT )‐filled epoxidized natural rubber ( ENR ) composites. To ensure better dispersion in the elastomer matrix, the MWCNTs were initially subjected to aminopropyltriethoxysilane ( APS ) treatment to bind a…
Abstract The thermal spin‐crossover behaviour, photoexcitation and subsequent relaxation, as well as the pressure‐induced spin‐crossover behaviour at 298 K are discussed for the non‐porous two‐dimensional Hofmann‐like coordination polymer [Fe(3‐Clpy) 2 Pd(CN) 4 ] ( 1 ). The title compound undergoes a two‐step, coopera…
Abstract A class of firefighting foams, known as aqueous film‐forming foam (AFFF), has the ability to form a film by spreading on the free surface of some hydrocarbon fuels. To find out whether this film could reduce the evaporation losses of volatile hydrocarbons, the evaporation rates of fuels covered with a film of…
A systematic set of borotellurite glasses doped with manganese (1-x) [(B(2)O(3))(0.3)(TeO(2))(0.7)]-xMnO, with x = 0.1, 0.2, 0.3 and 0.4 mol%, were successfully synthesized by using a conventional melt and quench-casting technique. In this study, the remelting effect of the glass samples on their microstructure was in…
We demonstrated a low voltage and high contrast polymer-stabilized blue phase liquid crystal (BPLC) by shifting the Bragg reflection to a red wavelength. To retain high contrast ratio, a left-handed BPLC is sandwiched between a right-handed circular polarizer and a left-handed circular analyzer. The driving voltage is…
Abstract Two 2D Hofmann‐type spin‐crossover coordination polymers, [Fe(stpy) 2 Pt(CN) 4 ] · 0.5MeOH (stpy = 4‐styrylpyridine; 1 ) and [Fe(pep) 2 Pt(CN) 4 ] {pep = 4‐(2‐phenylethyl)pyridine; 2 }, have been prepared by using long co‐ligands with different flexibilities. These compounds form 3D interdigitate structures b…
With the characteristic lengths of electronic and thermal devices approaching the mean free paths of the pertinent energy carriers, thermal transport across these devices must be characterized and understood, especially across interfaces. Thermal interface conductance can be strongly affected by the strength of the bo…
Sputter deposited nanotwinned copper (nt-Cu) foils typically exhibit strong {111} fiber textures and have grain boundary networks (GBN) consisting of high-angle and a small fraction of low-angle columnar boundaries interspersed with crystallographically special boundaries. Using a transmission electron microscope base…
Single crystal BaTiO3 (BTO) has been grown epitaxially on GaAs using molecular beam epitaxy with a 2 unit cell SrTiO3 nucleation layer. The oxide film is lattice-matched to GaAs through an in-plane rotation of 45° relative to the (100) surface leading to c-axis orientation of the BaTiO3. X-ray diffraction confirmed th…
Structural disorder has a dramatic impact on the mechanical response and stability of solids. On the one hand, rigidity percolation shows that the limit of mechanical stability coincides with the emergence of floppy modes. On the other hand, the rigidity of solids is also lowered by nonaffine atomic displacements, i.e…
In situ piezoresponse force microscopy (PFM) imaging reveals highly non-linear kinetics of the superdomain boundary separating two a-c-domain bundles in BaTiO3 lamellae. It is suggested that this behavior is caused by an unscreened depolarizing field of newly switched domains that counter balances the driving force fr…
Fe2Ni2N/SiO2 nanocomposite was fabricated by thermal reduction in association with nitridation in flowing ammonia gas at elevated temperature. The electromagnetic parameters of as-prepared Fe2Ni2N/SiO2 nanocomposite were measured in a frequency range of 2–18 GHz. Furthermore, its magnetic properties were investigated…
Self-assembled, nanocomposite heteroepitaxial films of BiFeO3 + Fe3O4 (x BiFeO3 + (1 − x) Fe3O4), where x = 0.5 or 0.9, were grown on (011) SrTiO3. Depending on the value of x and on the film thickness, either exchange bias or exchange enhancement of coercivity was demonstrated. In epitaxially and highly strained (7%)…
The growth behavior of VO2 crystal film deposited on Al2O3 (0001) monocrystalline substrate by pulsed laser deposition was investigated by high-resolution synchrotron radiation X-ray diffraction (XRD). φ-scan XRD confirmed the in-plane epitaxial matching relation. Furthermore, fine structures observed in the φ-scan in…
The morphology of electrochemically formed mesoporous Ge double-layer and its transformations during ultra-high-vacuum annealing at 600–700 °C are investigated by scanning electron microscopy. It was found that the transformation occurs via mass transport at constant volume. The process transforms the pores into facet…
In this study, we discuss the effect of different milling parameters, such as the type and concentration of surfactants, milling energy, and milling time on the structural, morphological and magnetic properties of hard magnetic SmCo5 nanoflakes prepared by surfactant assisted high energy ball milling. Two kinds of sur…
A series of commercial photochromic dyes was applied to polyester by a solvent dyeing process followed by thermal fixation using dichloromethane as the solvent. The process was optimised in terms of solvent/fabric ratio, dye concentration and the conditions of thermal fixation. The dyed fabrics showed reversible photo…
The constituents of any network glass can be broadly classified as either network formers or network modifiers. Network formers, such as SiO2, Al2O3, B2O3, P2O5, etc., provide the backbone of the glass network and are the primary source of its rigid constraints. Network modifiers play a supporting role, such as charge…